Variable-drive mechanism for coil-winding machines and the like



1923 2 Sheets-Sheer?l l July 13 1926.

D. MACADIE VARIABLE DRIVE MECHANISM FOR COIL WINDING MACHINES AND TVHE LIKE Original Filed Jan. 1G.

July 13 1926. 1,592,375

D. MACADIE VARIABLE DRIVE MECHANISM FOR COIL WINDING MACHINES AND THE LIKE Original Filed Jan. 15. 1923 2 Sheets-Shee' 2 Patented July 13, 1926.

UNITED STATES A1,592,375 PATENT orrlcr..-

DONALD MACADIE, F LONDON, ENGLAND, ASSIGNOB T0 THE 'AUTOMATIC COIL WINDER do ELECTRICAL EQUIPMENT COMPANY LIMITED, OF LONDON, ENGLAND, A

BRITISH COMPANY.

VARIABLE-DRIVE MECHANISM FOR COIL-WINDING MACHINES AND TEE LIKE.

Original application filed January 16, 1,923, Serial No. 613,019, and in England January 20, 1922. Divided and this application tiled October 22, 1925. Serial No. 64,141.

This application is for the variable drive mechanism described in my co-pending application Serial No. 613,019 relating to a coil-winding machine which automatically l stops working when a predetermined length of wire corresponding to alven resistance has been wound on the bobbin, the object of the said variable drive mechanism being to permit of variation of the speed of reciprocation of the traverser arm relatively to the speed of rotation of the bobbin to be wound, so that wires of different thicknesses can be wound with their convolutions close together.

l5 In the drawin s,

Figure 1 is a ront elevation of the major part of a coil-winding machine having em bodied therein the variable drive mechanism according to this invention.

Figure 2 is substantially a plan of the same. and

Figure 3 is an end eleva-tion of the said variable drive mechanism.

Referring to the` drawings, and dealing n first with the general construction of the coil-winding machine, a is the base-plate, b is the motor for rotating the bobbin to be wound, c is an adjustable tail stock for supporting one end of the bobbin, d, d are end standards secured to the base and supporting a rotatable leading screw d1 for reciprocating the traverser arm which causes the wire to travel along the bobbin while it is being wound on the latter. The traverser mechanism shown in the drawings, forms the sub-- ject matter of my co-pending'application Serial No. 64,142. b1 is a driving disc secured on the motor spindle and arranged to drive, through the medium of a rubber shod 40 wheel e, a driven disc or follower d2, the face of which is parallel to the face of the driving disc b1 and which is fast on the leading screw d1. The bobbin to be wound is supported between the chuck b2 of the motor and the centre c1 of the tail-stock c.

Describing now in detail the variabledrive mechanism, the rubber-shod wheel e is rotatably mounted in a bracket c1 which can be slid along .a fixed guide rod e2 by means of a lever es which is pivoted at-e and is connected to the bracket e1 by means of a link e". The upper end of the lever es is provided with an operating knob e6 and is pointed (see broken slines in Figure 3) so that its position in relation to a Scale provided on a stationary plate e7 can be read oil".

This scale is graduated to correspond to different speeds of rotation of the leadingscrew d1 so that the speed withV which the wire is traversed along the bobbin while it is being wound on the latter can be varied to suit wires of different diameters. Thus, with the wheel e in the position shown in the drawings, the leading-screw would rotate at about :its minimum speed relatively to the speed of the motor, and that position would be appropriate for winding wire of thin diameter, but for thicker wire the lever e8 would be pushed inwards to a point on the scale corresponding to the speed required for the thicker wire so as to cause the wheel e to recede from the centre of the disc b1 and approach the centre of the disc d2 thereby increasing the speed of rotation of the leading-screw d1, and consequently causing the wire to be traversed along the bobbin `if'astcr in order to compensate for the larger diameter of the wire, as will be well understood.

I claim:

1. In a coil-winding machine, means for varying the speed of reciprocation of the traverser mechanism relatively to the speed of rotation of the bobbin to be woundv comprising an electric motor.' a chuck connected with the driving spindle of said electric motor for supporting the bobbin to be wound, a driving disc. secured to the driving spindle of said electric motor, a driven disc rigidly secured to a leading screw and rotatable in a plane parallel with the plane of rotation of the driving disc, said driven disc being eccentrically disposed with respect to the driving disc, a boll located between said driving and driven discs and means for moving the boll across the faces of the discs to vary the speed of the driven disc` with respect to that of the driving disc.

2. In a coil-winding machine, means for varying the speed of reciprocation of the traverser mechanism relatively to the speed of rotation of the bobbin to be wound comprising an electric motor, a chuck, connected with the driving spindle of said electric motor, for supporting the bobbin to be wound, a driving disc secured to the driving spindle of said electricmotor, a driven disc rigidly secured to a leading screw and rotatable in a plane parallel with the plane of rotation of the driving disc, said driven disc being eccentrically disposed with respect to the driving disc, a boll located between said driving and driven discs, means for moving the boll across the faces of the discs, and means to indicate the position of the boll between the two discs whereby the speed of the driven disc relatively to the speed of the driving disc may be adjusted.

3. In a coil-Winding machine, means for varying the speed of reciprocation of the traverser mechanism relatively to the speed of rotation of the bobbin to be wound comprising an electric motor, a chuck connected with the driving spindle of said electric motor for supporting the bobbin to be wound, a driving disc secured to the driving spindle of said electric motor, a driven disc rigidly secured to a leading scre'vtr and rotatable in a plane parallel with the plane of rotation of the driving` disc, said driven disc being eccentrically disposed with respect to the driving disc, a boll located betwee-n said driving and driven discs, a fixed guide rod, a bracket carrying the boll and adapted to be slid along said xed guide rod, a pivoted lever, and a link connecting said lever to the bracket.

4. In a coil-winding machine, means for varying the speed of reciprocation of the traverser mechanism relatively to the speed of rotation of the bobbin to be wound comprising an electric motor, a chuck, connected with said electric motor, for sup orting the bobbin to be wound, a driving secured to the driving spindle of said electric motor, a driven disc. rigidly secured to a leading screw and rotatable in a plane parallel with tbe plane of rotation of the driving disc and eccentrically disposed with respect to the driving disc, a boll located between said driving and driven discs, a fixed guide rod, a bracket carrying the boll and adapted to be slid along said fixed guide rod, a piv oted lever, an operating knob on-said lever, a link connecting said lever to the bracket, a stationary marked plate which in conjunction with the free end of the pivoted lever enables the speed, at which it is desired that the driven disc shall rotate, to be determined.

5. In a coil-winding machine, means for varying the speed of reciprocation of the traverser mechanism relatively to the speed of rotation of the bobbin to be wound comprising an electric motor, a chuck, connected with said electric motor, for supporting the bobbin to be wound, a driving disc secured to the driving spindle of said electric motor, a driven disc rigidly secured to a leading screw and rotatable in a plane parallel with the plane of rotation of the driving disc and eccentrically disposed with respect to the driving disc, a bolllocated between said driving and driven discs, a Xed guide rod, a bracket carrying a boll and adapted to be slid along said fixed guide rod, a standard having its upper end bent at right angles thereto, a stationary graduated plate secured to the bent end of said standard, a lever pivoted to the bottom end of said standard, an operating knob on said lever, a pointed upper end to said lever, a link connecting said lever to said bracket, the pointed upper end of said lever in conjunction with the stationary graduated plate enabling the speed at which it is desired that the driven disc shall rotate, to be determined.

In testimony whereof I have signed my name to this specification.

DONALD MACADIE. 

